.floating-nav {
  position: fixed;
  left: 50%;
  bottom: var(--sp-6);
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-1);
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}

.floating-nav.is-scrolled {
  box-shadow: var(--shadow-md);
  background: var(--nav-bg-scrolled);
}

.floating-nav__link {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-full);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease;
}

.floating-nav__link:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.floating-nav__link[aria-current="page"] {
  background: var(--accent-subtle);
  color: var(--accent-strong);
}

.floating-nav__dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: currentColor;
  opacity: 0.5;
  flex-shrink: 0;
}

.floating-nav__link[aria-current="page"] .floating-nav__dot {
  opacity: 1;
}

@media (max-width: 640px) {
  .floating-nav {
    left: var(--sp-4);
    right: var(--sp-4);
    bottom: var(--sp-4);
    transform: none;
    justify-content: flex-start;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .floating-nav::-webkit-scrollbar {
    display: none;
  }

  .floating-nav__link {
    flex-shrink: 0;
    padding: var(--sp-2) var(--sp-3);
    font-size: 0.7rem;
  }
}